While Waterford does require PPR, I’d be surprised if Wateford required pre-notice for Customs, but Peter is correct. The only way is to ask them .
Our customs proceedures is not backed up by legislation (at least none that places an obligation on the pilot) but there is a system of agreements between Customs and each airport. The only way to know what to do for any particular airport is to ask them.
dp
Weston is not a port of entry
One should always phone the airport 
5 mins ago…
You can fly between Weston and the rest of the EU.
If everybody is an Irish or UK passport holder they need 24hrs PNR for Customs/Immigration.
If somebody is non-UK/Irish but is EU, they need 48hrs PNR for Customs/Immigration.
If somebody is non-EU, they can’t do it.
This is why so many one-liners are of limited use. Always find out for yourself…
